Printer&#39;s registering device



Nov. 1, 1932. E. E. THlEL I PRINTER'S REGISTERING DEVICE Filed May 16,1929 i l 2 G e I 1: I x 13 hi A TTORNE Y.

Patented Nov. 1, 1932 PATENT OFFICE EIVIIL E. THIEL,

F CINCINNATI, OHIO, ASSIGNOR TO THE PRINTING MACHINERY GOM- PANY, OFCINCINNATI, OHIO, A CORPORATION OF OHIO PBINTERS :ansrsrnnnvo nnvrcnApplication filed May is, 1929. Serial No. 363,575.

My invention relates to printers registering devices which are adaptedtobe dropped in the groove of a printing plate support or p foundationplate and tightened against the printing plate to retain the same duringthe printing operation. f

It is the object of my invention to provide a simple drop-in hook forusewith a printing plate support having 0 the top than at the bottom, whichmay be dropped in position without any adjustment and which, by themanipulation of a screw within the device, may be adjusted tightlyagainst the edge of a printing plate.

;, Another object is the provisionof a dropin hook or registering devicecomposed of only two 'part'sa solid support and hook and a singleadjustment screw. Another object is the provision of a registeringdevice 201 which,'when the clampingjaw is against the edge of the plate,will enforce a locking engagement with the sides of the groove.

The above and other objects to which reference will be made in theensuing disclosure, I accomplish by that certain combination andarrangement of parts of which-I have shown a preferred modification.

Referring to the drawing Figure 1 is a plan View of a printing plateshowing a group of four registering devices retaining a printing plate.

Figure 2 is a sectional view of the combination shown in Figure 1 takenalong the lines device.

Figure 4 is a side elevation of the device. Figure 5 is a frontelevation of the device. Figure 6 is a sectional view of the devicetaken along the lines 6-6 in Figure 3.

The printing plate support or foundation plate illustrated is a flatplate 1 having grooves 2 therein which are truncated. in cross section,narrower at the top than at the bottom. Ordinarily the foundation forthe printing plates is in the form of a roller in which the grooves areendless and the registering devices must be of such construction thatthey will fit in by dropping within the groove rather than by beinginserted at the grooves narrower at Figure 3 is a plan view of theregistering p open end of a groove and worked forward tg positionagainst the edge of the printing ate.

supported on the foundation during the printing operation and great careis necessary in positioning the plate and holding it firmly in position.As a great number of the registering devices is necessary the cost ofmanufacture is an important matter, and as noted, one of my objects isthe provision of as inexpensive device as will adequately serve itspurpose.

The registering device is composed of a solid piece having a body 4which is in the form of a truncated cone with flattenedsides 5, 6. Theclamping hook has one edge provided with an inclined undercut face 7 andthe other edge 8 may be straight, as indicated. The flattened face 6 ofthe frusto conical body 4L preferably extends in alignment with thestraight edge 8, and the other flattened side 5 extends to the loweredge 9 of the inclined face 7 V The device has a bore through it axiallyof the body 4, and the lower part of the bore is threaded and has ascrew 10 screwed therein, having a squared socket 11 in its upper end,into which a wrench pin may be inserted through the upper end 1E2 of thebore.

It will be noted that the groves 2 in the foundation plate extenddiagonally relative to the sides and ends of the printing plate, andtherefore, as long as the clamping jaw is arallel with the flattenedsides of the body of-the device, when the jaw is aligned against he sideor end of a plate, the rounded conical sides of the body will project inunder the tapering side walls of the groove against which wallsthey willbear with the walls tangent to the conical sides when the screw isturned down.

Looking at the body of the device as shown in Figures 5 and 6, the shapeof the frustum formed by the body will be substantially the same as theshape of the groove while looking at the drop-in hookendwise, as inFigure d, the distance apart of the flattened sides 5 and 6 will be justenough to clear the distance between the walls at the top of Theprinting plate 3 must be accurately the opening in the groove. Thus, toinsert the hook in a groove all that is necessary is to hold it with theflattened sides of the body parallel with the edges of the wallsoutlining the opening at the top of the groove. After the body is in thegroove the device is turned so that the tapered conical walls of thebody will extend in under the overhanging walls ofthe oove.

As t e screw is turned down with the wrench pin the lower end of thescrew bears against the base of the groove and the body is permitted tobe rocked toward the plate slightly by its line contacts against theoverhanging tapered walls of the groove, causlng the clamping face 7 ofthe jaw to press lat- My and downwardly against the inclined of a wallof the plate as the screw is tened.

t is important that the screw be turned down tightly because if the bodybecomes displaced the device is liable to fall out and ruin a printingplate. Modifications in structure in which the same inventive principleinvolved is employed will readily occur to those skilled in the art, butinsofar as such modifications represent no more than mechanical changesin size and shape, I consider such modifications within the scope of myad invention.

' Having thus described my invention, what I claim as new and desire tosecureby Lettens Patent, is

A 1. A clamping member for a printers registering device comprising abody in the shape of a truncated cone and a hook part ed on the smallend of said body and extending laterally therefrom, and ressure fiziansextensible from the large end of said 2. A clamping member for aprinters registering device comprising a body in the shape of atruncated cone with opposite flat sides parallel with the axis of thecone, and a a hook part fixed to the smaller end of said body andextending laterally therefrom substantially at right angles to saidaxis, and

pressure means extensible from the large end ofsaid body.

6t? 3. A clamping member for a rinters registering device comprising aho y in the shape of a truncated cone with opposite fiat sides arallelwith the axis of the cone, and

g a 1100 part fixed to the smaller end of the 8!? body and extendinglaterally therefrom substantially at right angles to said axis andhaving an engaging face substantially parallel with one of said flatsides, and pressure means extensible from the large end of said 89 bod4, clamping member for a printers registering device comprising a bodyin the gaps of a truncated cone and a hook part ed on the small end ofsaid body and extendmg laterally therefrom, said body haver a ing anopening axially therethrough, and a clamping screw threaded into thepart of the opening next to the large end of said body and extensiblefrom said large end and provided with means engageable for turning it byan instrument inserted into the opening at said small end of the body.

5. In a printers registering device, in combination with a base memberhaving a plate supporting surface and a groove opening through saidsurface with straight sides converging toward said surface, a clamp'member comprising a truncated-cone shaped body fitting in said grooveand a plate-engaging hook part fixed on the small end of the body andextending laterally therefrom across said surface, said body having anopening axiall therethrough, and pressure means operative y engageablethrough the opening at the small end of the body and extensible from theopening at the large end of the body against the bottom of the roove.

6, In a printers registering device, in combination with a base memberhaving a platesupporting surface and a groove opening through saidsurface with straight sides converging toward said surface, a clampinmember comprising a truncated-cone shaped body fitting in said grooveand a plate-engaging hook part fixed on the small end of the body andextending laterally therefrom across said surface, said body having anopening axially therethrough, and a clamping screw threaded into thepart of said opening next'to the large end of said body and extensiblefrom said large end against the bottom of the groove and provided withmeans for turning it by an instrument inserted into the opening at thesmall end of said body.

EMlL E. THIEL.

